Method and apparatus for deconvolving apparent conductivity measurements in induction well logging

Patent · Tue Aug 05 00:00:00 EDT 1986

OSTI ID:5378964

Thadani, S G; Merchant, G A

An induction well logging apparatus is described for measuring the true conductivity of earth formations in the vicinity of a well borehole comprising: (a) transmitter and receiver coil system for movement through a well borehole and operated so that a variation of propagation effects in the formation are negligible, the coil system providing an output signal related in value to the apparent conductivity of the formation; and means for operating on the output signal with an inverse vertical response function of the coil system to obtain a signal related in value to an approximation of the true conductivity of an incremental portion of the formation adjacent the well bore at the depth of investigation; and means for recording the signal related to an approximation of the true conductivity as a function of borehole depth of the coil system.

• Assignee: Halliburton Co., Duncan, OK
• Patent Number(s): US 4604581
• OSTI ID: 5378964
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
BOREHOLES
CAVITIES
DEPTH
DIMENSIONS
ELECTRIC COILS
ELECTRIC CONDUCTIVITY
ELECTRIC LOGGING
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EQUIPMENT
FUNCTIONS
GEOLOGIC DEPOSITS
INDUCTION LOGGING
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
PHYSICAL PROPERTIES
RECORDING SYSTEMS
RESOURCES
RESPONSE FUNCTIONS
SIGNALS
WELL LOGGING
WELL LOGGING EQUIPMENT